EP0786579A1 - Air motor piston to crank linkage - Google Patents

Air motor piston to crank linkage Download PDF

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Publication number
EP0786579A1
EP0786579A1 EP97300358A EP97300358A EP0786579A1 EP 0786579 A1 EP0786579 A1 EP 0786579A1 EP 97300358 A EP97300358 A EP 97300358A EP 97300358 A EP97300358 A EP 97300358A EP 0786579 A1 EP0786579 A1 EP 0786579A1
Authority
EP
European Patent Office
Prior art keywords
yoke
crank
bearing
pivot link
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP97300358A
Other languages
German (de)
English (en)
French (fr)
Inventor
Leslie J. Sell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ingersoll Rand Co
Original Assignee
Ingersoll Rand Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ingersoll Rand Co filed Critical Ingersoll Rand Co
Publication of EP0786579A1 publication Critical patent/EP0786579A1/en
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B1/00—Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements
    • F01B1/08—Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements with cylinders arranged oppositely relative to main shaft and of "flat" type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B17/00—Reciprocating-piston machines or engines characterised by use of uniflow principle
    • F01B17/02—Engines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18208—Crank, pitman, and slide

Definitions

  • This invention relates generally to air motors and more particularly to a piston to crank linkage for an air motor for a hoist.
  • Linked piston air motors utilize one of two well known bearing arrangements for connecting the piston rods to the crank shaft.
  • the crank shaft has a single journal to which the rods are connected at the same axial location or, in the case of six piston motors, at two adjacent axial locations.
  • the rod ends are segmented so that together they form a complete bearing that encircles the crankshaft journal.
  • the segmented rod ends have sufficient clearance between adjacent rod ends to allow the rods to pivot independently and are held against the journal by retaining rings that encircle the outside of the segments.
  • one of the connecting rods known as the "Queen Rod” contains a bearing that fits over the crankshaft journal.
  • the bearing housing on this rod has a flange around the outside to which the remainder of the rods are pinned.
  • the pistons of these motors require sufficient skirt length to prevent them from tipping and jamming in the cylinder bore.
  • the ratio of piston length to diameter is usually greater than 0.6, adding significantly to the size and inertia of the moving parts. This results in an air motor that is large in comparison to its power output. Because of the requirement to pin the rods outside of the crank bearing, the "Queen Rod" air motor requires even greater space.
  • the yoke must be hardened steel to withstand the wear caused by the bearing scuffing at high speeds.
  • An additional bearing arrangement is usually required to prevent the yoke from twisting on its axis which would throw it out of perpendicular alignment with the crank pin.
  • an air motor piston to crank linkage comprising a pair of opposed pistons disposed in opposed cylinder chambers for reciprocation therein and interconnected by a open centre rigid yoke having a continuous sided open centre, and a pivot link and a crank; characterised in that there is a crank to pivot link connection rotating about said crank and in the confines of said open centre of said yoke and translating relative to said yoke along an arc segment as defined by said pivot link connecting one of said pair of opposed pistons to said crank connection.
  • an air motor for a winch or hoist or the like including a motor body 20 having cylinder caps 21 and 21A installed at opposite ends to form opposed piston cavities.
  • pairs of pistons 1 and 1A (or multiple pairs of pistons axially offset and/or radially offset as, for example, 90° for a four cylinder radial motor) are yoked together to provide great bearing length (i.e., the distance between the pistons) but their force is transferred to the crank 15 through a single pivoting link 7 attached to one end of the yoke 25. Since two pistons 1 and 1A share the same link, the number of bearings required for the link is half that of a motor with conventional connecting rods. As in the "Scotch Yoke" arrangement, the pistons require only sufficient length for a seal ring that also acts as a bearing to support the side load.
  • the pistons 1 and 1A are linked together by an open center rigid yoke 25.
  • the open center 30 provides clearance for the crank pin 10 to rotate in and translate along an arc relative to the yoke 25 as defined by the pivoting link 7 about pin 8.
  • the open center or clearance opening 30 is in the form of opposed trapezoidal openings 31 and 31A connected by semicircular bridges 32 and 32A on the top and bottom as shown in Fig. 1 to form a continuous sided opening.
  • the yoke is planar.
  • the pre-lubricated and sealed bearings 6 and 9 are used to pivot the link.
  • the bearings are standard items requiring no further crankcase lubrication. These bearings also act to prevent the yoke from twisting on its axis.
  • the yoke 25 and pistons 1 and 1A are cast as a single piece from aluminum or other suitable structural material.
  • Each piston includes a plastic seal ring 2 which also acts as a piston support bearing. Seal ring 2 is backed by O-ring 3 to effect resilient sealing pressure on the seal ring and is held on the piston by retaining ring 4.
  • Each piston 1 and 1A slideably engages its respective cylinder 5 and 5A. Sealed bearing 6 is pressed into yoke 1.
  • Link 7 is pinned through sealed bearing 6 by pin 8 through web 26 of yoke 25.
  • Link 7 also contains sealed bearing 9 that engages crank pin 10.
  • Sealed bearing 6 is a standard deep groove ball bearing that is pressed into the yoke with sufficient interference to reduce its internal clearance. In this condition the bearing provides a high degree of stiffness to the link to prevent it from twisting and to eliminate any tendency for axial movement on the yoke. When the yoke is assembled with a needle roller bearing 9 engaging the crank pin 10, this stiffness is transferred to the yoke to prevent the entire assembly from twisting on its axis. This permits the connecting yoke and assembly to be manufactured with a minimum axial length piston, minimum yoke depth and minimum adjacent piston offset for multiple radial piston sets, which in turn results in the ability to manufacture compact motors with minimum diameter and axial crank length dimensions. Several pairs of pistons may be arranged in so-called “pancake” form (opposed 2 cylinder, 4 cylinder, 6 cylinder, etc.) or in "radial” form (4, 6, 8 cylinder, etc.).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Transmission Devices (AREA)
EP97300358A 1996-01-24 1997-01-21 Air motor piston to crank linkage Ceased EP0786579A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US590986 1996-01-24
US08/590,986 US5638738A (en) 1996-01-24 1996-01-24 Air motor piston to crank linkage

Publications (1)

Publication Number Publication Date
EP0786579A1 true EP0786579A1 (en) 1997-07-30

Family

ID=24364554

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97300358A Ceased EP0786579A1 (en) 1996-01-24 1997-01-21 Air motor piston to crank linkage

Country Status (3)

Country Link
US (1) US5638738A (ja)
EP (1) EP0786579A1 (ja)
JP (1) JPH09209702A (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002209516A (ja) * 2001-01-19 2002-07-30 Nisshin Oil Mills Ltd:The 食用油脂組成物
DE10360920B3 (de) * 2003-12-23 2005-09-22 Meta Motoren- Und Energie-Technik Gmbh Hubkolbenverdichter
WO2005105503A1 (es) * 2004-04-29 2005-11-10 Francisco Javier Ruiz Martinez Mecanismo recuperador de energía en vehículos autopropulsados
US20060070812A1 (en) * 2004-09-24 2006-04-06 Eggleton Jerry W Battery-operated grease gun
US20070210659A1 (en) * 2006-03-07 2007-09-13 Long Johnny D Radial magnetic cam
DE102007005228B4 (de) 2006-08-25 2020-07-02 Grini Miskarov Motor mit einen im Querschnitt rechteckigen Kolben
DE102006042122A1 (de) * 2006-09-07 2008-03-27 Linde Ag Verdichter
WO2014081349A2 (ru) * 2012-11-22 2014-05-30 СУРХАЕВ, Рамзан Саламович Двигатель внутреннего сгорания
CA2913846C (en) * 2014-12-04 2022-11-15 Circle Dynamics Inc. Connecting rod and piston for an oil-less pneumatic motor
DE102016001576A1 (de) * 2016-02-11 2017-08-17 Wabco Gmbh Hubkolbenmaschine, insbesondere zwei- oder mehrstufiger Kolbenkompressor, Druckluftversorgungsanlage, Druckluftversorgungssystem und Fahrzeug, insbesondere PKW mit einer Druckluftversorgungsanlage
RU2018144251A (ru) * 2016-05-17 2020-06-17 Гал ГОЛДНЕР Компрессор

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR830293A (fr) * 1936-12-15 1938-07-25 Tilling Stevens Ltd Moteur à cylindres diamétralement opposés
US2310733A (en) * 1942-03-25 1943-02-09 Duke Charles Austin Internal combustion engine
US3200800A (en) * 1962-04-27 1965-08-17 Bois Francois M Du Internal combustion engine
DE2746203A1 (de) * 1977-10-14 1979-04-19 Bernhard Karl Dipl Ing Verbrennungsmotor

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US545032A (en) * 1895-08-20 Condensing- pump
US190938A (en) * 1877-05-15 Improvement in steam-engines
US669290A (en) * 1900-06-22 1901-03-05 Fredrick Stoer Engine.
US947882A (en) * 1901-09-03 1910-02-01 Gen Electric Electric air-compressor.
US887855A (en) * 1907-04-22 1908-05-19 Reinhold Reichardt Engine.
US1386753A (en) * 1919-12-11 1921-08-09 Baer Walter Charles Refrigeration apparatus
US1523790A (en) * 1922-10-23 1925-01-20 Albert B Pedersen Air compressor
US1727049A (en) * 1927-03-09 1929-09-03 Eugene A Cobb Compressor
CH512017A (de) * 1969-07-04 1971-08-31 Burckhardt Ag Maschf Kreuzkopfeinrichtung für den mechanischen Antrieb von Hochdruck-Kompressoren oder -Pumpen
US3839946A (en) * 1972-05-24 1974-10-08 Hardie Tynes Mfg Co Nonlubricated compressor
US4230026A (en) * 1978-10-25 1980-10-28 Hartley E Dale Reciprocating piston device
GB2060785B (en) * 1979-09-26 1983-11-23 Hamworthy Engineering Opposed piston machinery
US4762051A (en) * 1986-07-17 1988-08-09 Dresser Industries, Inc. Single acting pump with double acting drive
US4729291A (en) * 1986-07-18 1988-03-08 Ingersoll-Rand Company Gas compressor
US4756674A (en) * 1987-08-24 1988-07-12 Ingersoll-Rand Company Reciprocating gas compressor having a split housing and crosshead guide means
NL8800036A (nl) * 1988-01-08 1989-08-01 Hendrikus Peter Van Der Waal Pomp of motor met ten minste een in een cilinderboring aangebracht zuigerlichaam.
US4931000A (en) * 1989-03-02 1990-06-05 Gilian Instrument Corp. Double acting diaphragm air pump
US5259256B1 (en) * 1992-07-31 1995-06-13 Douglas C Brackett Motion converter with pinion sector/rack interface
US5351567A (en) * 1993-11-08 1994-10-04 Brackett Douglas C Motion arrester for a conjugate drive mechanism
US5375566A (en) * 1993-11-08 1994-12-27 Brackett; Douglas C. Internal combustion engine with improved cycle dynamics
US5431130A (en) * 1993-11-08 1995-07-11 Brackett; Douglas C. Internal combustion engine with stroke specialized cylinders
US5417309A (en) * 1993-11-08 1995-05-23 Brackett; Douglas C. Lubrication system for a conjugate drive mechanism
US5445039A (en) * 1994-03-18 1995-08-29 Brackett; Douglas C. Conjugate drive mechanism

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR830293A (fr) * 1936-12-15 1938-07-25 Tilling Stevens Ltd Moteur à cylindres diamétralement opposés
US2310733A (en) * 1942-03-25 1943-02-09 Duke Charles Austin Internal combustion engine
US3200800A (en) * 1962-04-27 1965-08-17 Bois Francois M Du Internal combustion engine
DE2746203A1 (de) * 1977-10-14 1979-04-19 Bernhard Karl Dipl Ing Verbrennungsmotor

Also Published As

Publication number Publication date
JPH09209702A (ja) 1997-08-12
US5638738A (en) 1997-06-17

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